A nonlocal softening plasticity based on microplane theory for concrete at finite strains

Indriyantho, Bobby Rio; Zreid, Imadeddin; Kaliske, Michael

doi:10.1016/j.compstruc.2020.106333

Cited by 6 publications

(4 citation statements)

References 39 publications

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“…As a result, the MP formulation has gained popularity for describing quasi-brittle materials. It offers computationally efficiency surpassing that of conventional models (Leukart and Ramm, 2006;Grassl and Jirásek, 2006a;Zreid and Kaliske, 2016b;Zreid and Kaliske, 2018;Steinke et al, 2017;Schreter et al, 2018;Indriyantho et al, 2020).…”

Section: Concrete Constitutive Model -Microplane Mpmentioning

confidence: 99%

Bond Behavior of Auxetic Bars in Reinforced Concrete – A Numerical Study

García Sánchez,

Quintero Ramírez,

Gonçalves

et al. 2024

Lat. Am. j. solids struct.

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The study aims to enhance the bonding strength in reinforced concrete using a novel Auxetic Tubular Deformed Rebar (ATDR). A high-resolution non-linear finite element model was developed to perform numerical analysis of pull-out tests (PoT). Two sets of numerical simulations were conducted: one to replicate the concrete behavior under compression and tension tests, and the other for PoT, validated with experimental and numerical data. Numerical tests utilized a microplane model with plasticity-damage, regularized by an implicit gradient. Auxetic geometry involves adding ellipsoidal orifices to the rebar surface. Comparing the behavior of ATDR with the conventional rebar, we observed an increase in the negative value of Poisson's ratio, resulting in higher normal and shear forces, enhancing adherence. This study presents the first comprehensive simulation of Auxetic Metamaterial Rebar in concrete, offering a promising approach to enhance bond strength. Further research, both numerical and experimental, is essential to assess Auxetic Reinforcement's mechanical behavior in diverse structural elements and load scenarios.

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Section: Concrete Constitutive Model -Microplane Mpmentioning

confidence: 99%

Bond Behavior of Auxetic Bars in Reinforced Concrete – A Numerical Study

García Sánchez,

Quintero Ramírez,

Gonçalves

et al. 2024

Lat. Am. j. solids struct.

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“…The structural behavior of RC members is rather complex, involving brittle concrete behavior and, conversely, the ductile behavior of steel. This nonlinear response of concrete and steel, respectively, can be represented using plasticity and damage approaches (Alfarah et al, 2017; Indriyantho et al, 2020). Nevertheless, as the presence of the reinforcement brings more ductility, the concrete in RC members can be better described in FEA by using a combined damage and plasticity model.…”

Section: Finite Element Modelingmentioning

confidence: 99%

Modeling of non-ductile RC structure under near-fault ground motions: A nonlinear finite element analysis

Hidayat

Hsiao

et al. 2022

Advances in Structural Engineering

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The old existing reinforced concrete (RC) structures in Taiwan are susceptible to severe damage under earthquakes because of the soft-story mechanism. Moreover, the effects of near-fault ground motions often contain a long period of velocity pulse and permanent ground displacement. This study is based on the tri-axial shaking table test conducted at the National Center for Research on Earthquake Engineering in Taiwan and a series of seismic performance evaluations of a non-ductile RC structure in Taiwan. Finite element analysis (FEA) will be conducted to simulate the linear and nonlinear behavior of the seven-story building. This accommodates the damage plasticity model for concrete and the elastic-perfectly plastic model for reinforcement. Comparison of the results between the experimental test and numerical model showed that the similarity of the vibration period has a great influence on the simulation results. The findings showed that the data of acceleration and displacement behavior corresponded with the experimental results in a satisfactory margin. Also, the damage mode is very similar to the shaking table test results. The study found that using FEA can satisfactorily simulate the seismic performance of mid-rise buildings under a near-fault earthquake.

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“…Coelho and Roehl (2019) proposed a finite-strain elastoplasticity material model for ETFE membrane structures. Indriyantho et al (2020) investigated the nonlocal softening plasticity for concrete at finite strains. Rawat et al (2021) proposed a nonlocal plasticity-based damage model using an isogeometric approach for quasi-brittle materials.…”

Section: Introductionmentioning

confidence: 99%

“…Coelho and Roehl (2019) proposed a finite–strain elastoplasticity material model for ETFE membrane structures. Indriyantho et al. (2020) investigated the nonlocal softening plasticity for concrete at finite strains.…”

Section: Introductionmentioning

confidence: 99%

A unified general framework for small and finite strain two-invariants elastoplasticity

Spiezia

Salomoni

2022

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PurposeThis paper proposes a unified original general framework, designed to theoretically develop and to extremely easily implement elastoplastic constitutive laws defined in the so called two-invariants space, both in small and finite strain regime.Design/methodology/approachA general return mapping algorithm is proposed, and particularly a standard procedure is developed to compute the two algorithmic tangent operators, required to solve the Newton–Raphson scheme at the local and global level and thus cast the elastoplastic algorithm within a FEM code.FindingsThis work demonstrates that the proposed procedure is fully general and can be applied whatever is the elastic law, the yield surface, the plastic potential function and the hardening law. Several numerical examples are reported, not only to demonstrate the accuracy and robustness of the algorithm, but also explain how to use this general algorithm also in other applications.Originality/valueThe proposed algorithm and its numerical implementation into a FEM code is new and original. The usefulness and the value of the algorithm is twofold: (1) it can be implemented in a small and finite strain simulation FEM code, in order to handle different types of constitutive laws in the same modular way, thus fully leveraging on modern object-oriented coding approach; (2) it can be used as a framework to develop (and then to implement) new constitutive models, since the researcher can simply define the relevant functions (and its main derivatives) and automatically get the numerical algorithm.

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A nonlocal softening plasticity based on microplane theory for concrete at finite strains

Cited by 6 publications

References 39 publications

Bond Behavior of Auxetic Bars in Reinforced Concrete – A Numerical Study

Bond Behavior of Auxetic Bars in Reinforced Concrete – A Numerical Study

Modeling of non-ductile RC structure under near-fault ground motions: A nonlinear finite element analysis

A unified general framework for small and finite strain two-invariants elastoplasticity

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